border collie pulling a stick

pets dogs chews girl one people arm pulling border collie dog harness outdoors playing teeth dental care healthy powerful jaws strong biting hard mouth sharp carnivores maxilary veterinary molars dentition maxila anatomical features mandible hold prey pedigreed domestic purebred canis canidae mammals nature predator animal canine anatomy shearing flesh canids hunting abilities training winter gloves puppy predatior mountain season owner stick young woman holding concept